baber/WOPTO huggingface dataset:
Patent GB-698054-A (GB)
Title: Improvements in circuits for use in telephone systems
IPC: H04Q1/446
Filed: 1951-03-14
Abstract: 698,054. Voice frequency signal receivers. PHILIPS ELECTRICAL INDUSTRIES, Ltd. March 14, 1951 [March 17, 1950], No. 6161/51. Class 40 (iv). In a V.F. signal receiver which comprises a thermionic valve 8 with grid potential control effected by the opposed rectified outputs of signal and guard filters 14 and 20, the signal and guard filters are connected in the cathode and anode circuits respectively and are energized by the A.C. current component through the valve with the input impedance of filter 14 providing variable negative feed-back which is a maximum at the signal frequency. A fixed bias on the screen grid normally maintains the D.C. component of the anode current below the operating value for a relay 13 which constitutes a part of the filter 20. This filter accepts all frequencies above 1000 c.p.s. as does a similar high-pass filter 7 which is connected in the signal input circuit at a transformer 3. Filter 14 is a band-pass filter with an acceptance range of 2940 c.p.s. to 3060 c.p.s. and maximum input impedance at a signal frequency of 3000 c.p.s. In consequence the variable negative feed-back will be a maximum at the signal frequency and the A.C. potential across filter 20 will be low. If the signal frequency only is received, the control grid is driven positive by the rectified signal potential across resistor 16 and the D.C. component of the anode current is increased sufficiently to operate the relay. If several frequencies are received together the reduced input impedance of filter 14 to frequencies outside its pass range causes an increase in the A.C. potential across filter 20 and hence the application of a disabling bias to the grid circuit over resistor 22. The high-pass filters 7 and 20 prevent the valve from operating as an anode bend detector at low frequencies and also prevent a train of signal frequencies affecting the response by their apparent simulation of lowfrequency modulation.
Patent GB-298848-A (GB)
Title: Improvements in double-needle sewing machines and chiefly in machines for open-work
IPC: D05B3/04
Filed: 1928-02-28
Abstract: 298,848. Anciens Etablissements R. Cornely et Cie. Nov. 16, 1927, [Convention date]. Addition to 294,599. Multiple needle machines.-A plate 36' serves as a partition between two rotary loop-takers and prevents the needle-thread loops from fouling one another as they are drawn off the looptakers. The plate may be secured to the feedbar or any other suitable part of the machine.
Patent GB-907423-A (GB)
Title: Improvements in the measurement of the mean optical density of the atmosphere
IPC: G01N21/53
Filed: 1961-02-21
Abstract: 907,423. Photo-electric visibility determination. COMPAGNIE DES COMPTEURS. Feb. 21, 1961 [Feb. 22, 1960], No. 6314/61. Class 40 (3). The invention relates to an improved process for measuring the visibility, or mean optical density of the atmosphere. In the known process on which the invention is based, a beam of light from a transmitter E (Fig. 2) is directed to a particular point S in the atmosphere and the zone of light surrounding the point is viewed by two photo-electric receivers R 1  and R 2  over paths of length L 1  and L 2  respectively making equal angles at S with the beam axis E 1  S. The coefficient of attenuation # is given by the equation: where A is a calibration constant that can be determined in clear weather, V 1  = the conversion factor of R 1  times the light flux received at R 1  and V 2  a similar product for R 2 . As the result obtained is dependant on the conversion factors of the receivers, which may vary with time, it is proposed according to the invention, to perform two successive measuring operations in two symmetrical positions with the aid of the same receivers. The first determination is performed with the geometrical arrangement shown in Fig. 2 and then the receivers R 1  and R 2  are re-orientated and perform an identical determination with respect to a point S<SP>1</SP> illuminated by a beam from source E 2.  It is shown that # is then given by the expression: where C, like A previously, may be determined in clear weather, V<SP>1</SP> 1  and V<SP>1</SP> 2  refer to the second measurement, and the value of # is independent of the ratio of the conversion factors of the receivers. As described, a pulsed transmitter is used and each transmitted pulse is synchronous with the start of a time-base sweep on a cathode-ray oscillograph. The receiver outputs are applied to deflect the trace in alternate sweeps and that giving the greater deflection reduced by a calibrated attentuator until both are equal. The value log. V 2 /V 1  or log. V<SP>1</SP> 1 /V<SP>1</SP> 2 , as the case may be, can then be read from the attenuator calibration. A drive mechanism, with an elastic coupling and limit switches, suitable for accurately aligning the receivers in the two required directions is described with reference to Fig. 4 (not shown).
Patent GB-374036-A (GB)
Title: Improvements in or relating to knitting machines
IPC: D04B15/58
Filed: 1931-02-28
Abstract: 374,036. Knitting-machines. HOLMES, H. H., ROBINSON, R. H., and WILDT & CO., Ltd., Adelaide Works, Leicester. Feb. 28, 1931, No. 6337. [Class 74 (ii).] Means are provided for closmg a yarn-gripper associated with a yarnfeeder of a knitting- machine at a time when the needle 120 which is the last to take yarn 16 from the feeder is approximately at the knocking- over point. Breaking stress is thus imposed on the varn 16 as or immediately after a loop a of the previous course is knocked over on the last needle 120 to take the yarn 16. At this time the yarn is lapped sharply round a bight of the previous loop and will be snapped off close to the fabric. The yarn gripping and feeding means are preferably as described in Specification 367,410.
Patent GB-139781-A (GB)
Title: Improvements in and relating to magnetos
IPC: H02K21/38
Filed: 1920-03-02
Abstract: 139,781. FÚrat, E. T. Jan. 14, 1918, [Convention date]. Void [Published under Sect. 91 of the Act]. Magneto-electric machines; inductor-machines.-In magnetos for internal - combustion engines, the rotating poles are carried on a sleeve or non-magnetic material, the laminated pole-pieces are clamped between non-magnetic plates and then cast in position in the frame, and the armature is secured to the frame by screw bolts having cut-away washers. The rotating poles a, b, Fig. 1, aie secured by screws or rivets to projections on the non-magnetic rotor 7, and the armature 13 is secured to the frame 9. The front plate 8 is embedded in the frame 9 during casting, and the part 10 is provided with tapped holes to secure the magneto to the engine. The rear plate 11 is centred in the frame 9 by means of a ring 12. The distributor is mounted on a flanged pivot 5 in which a slot 6 forms the transverse guides for the block 4, which is driven from the rotor by the crankpin 1 on the disk 2; alternatively, the speed-reducing device may comprise a toothed pinion engaging an internally-toothed gear wheel. The copper strip 27 within the recess 28 of the insulating block 29 resiliently connects the armature secondary to the distributing device 43 by means of the rod 80 and the head 31 engaging the spring 32. The safety spark-gap is arranged in a cavity 33, Fig. 5, formed in the annular casing 34, the pin 36 being provided with a hole in which the rod 30 slides. To prevent oxidization of the distributor parts, the cavity 33 is separated from the rest of the magneto by an insulating plug 37. A starting device is provided and consists in a carbon brush-holder 38 mounted on the annular casting 34 and in contact with the collector ring 39 of the rotary element 40, Fig. 1. The primary winding of the armature terminal 24, Fig. 4, is connected to the terminal 25, 4 and 6, of the contact-breaker by a flexible cable soldered at both ends and passing from the interior of the magneto through a hole 26 formed in one of the end plates. The contact-breaker is mounted by two half rings 16, 17 in an annular groove 15, Fig. 1, and secured by screws 18, and is provided with a cover 19, pivoted at 20, arranged so as to allow exposure on three sides of the platinum contacts. Lubrication for the bearing 22 is furnished by the orifice 21 at the channel piece 23 or 23b according to the direction of rotation.
Patent GB-982571-A (GB)
Title: Improvements in or relating to filters
IPC: B01D35/14
Filed: 1960-02-23
Abstract: 982,571. Filters for liquids. SIMMS MOTOR UNITS Ltd., and W. FRIEDLANDER. Feb. 15, 1961 [Feb. 23, 1960], No. 6407/60. Heading BID. Unfiltered liquid (e.g. oil) entering at 15, Fig. 4, filters inwards through a fine hollow tubular paper element 21, and leaves via holes 28 in an upper support member 23 and conduits 32 and 16. On clogging of element 21 and consequent attainment of a predetermined pressure difference, some oil passes through a lower support member 24 by means of a spring- loaded valve 41, and then outwards through a coarser hollow tubular paper element 22 to the holes 28. In a simpler form of the invention, Fig. 3 (not shown), the valve 41 is replaced by a constriction, through which there is a very small flow to element 22 even initially. A spring by-pass valve 37 for both elements is provided. Valve 41 may have a multi-coloured downward extension visible through a transparent cap secured to the bottom of the container 17 to indicate the position of the valve. In Fig. 6 a valve 41b equivalent to 41 is provided in a securing-bolt 61 and communicates with the space outside the filter element 21 by conduits 36, 66 and 65.
Patent GB-630907-A (GB)
Title: Improvements relating to geared locomotives
IPC: B61C9/10
Filed: 1947-03-07
Abstract: 630,907. Change-speed gear combinations. HUNSLET ENGINE CO., Ltd., and ALCOCK, J. F. March 7, 1947, No. 6419. [Class 80 (ii)] In a single- or multi-engined diesel locomotive, gear-shift without interruption in tractive effort is obtained by the use of two or more separate changespeed gears b or multi-ratio power-paths through a single change-speed gear, at least two of which gears or power-paths normally transmit power simultaneously, whilst, during a gear-shift in one, torque transmission is maintained through another. The ratios in the change-speed gears or power-paths lie intermediate each other to provide small stepped changes by making changes in the separate gears or power-paths alternately. As shown two engines a each drive independent or coupled axle-groups d through the separate change-speed gears b and clutches c, the latter preferably of the hydraulic torque-converter type. In the multi-engined form the engines normally operate at different speeds, but where a single engine drives through two changespeed gears (Fig. 3, not shown) or multi-ratio, powerpaths, speed differences due to simultaneouslyeffective different ratios in each gear or path are accommodated by slip in hydraulic torque-converters through which each gear or path is driven.
Patent GB-928871-A (GB)
Title: Papermakers' felt and method of making the same
IPC: D04H13/00
Filed: 1961-02-22
Abstract: 928,871. Felt; laminates. HUYCK CORPORATION. Feb. 22, 1961 [Feb. 29, 1960], No. 6447/61. Classes 42 (2) and 140. A papermaker's felt comprises a base fabric woven from yarns at least some of which contain sufficient fullable fibre to render the fabric capable of substantial fulling, and a nap consisting of one or more continuous layers of non- woven fibre secured to at least one side of the base fabric by needling while the base fabric is still fullable, and further secured to the base fabric by fulling. Fulling is defined as the application of water to the fabric in a manner such that there is some reduction in one or both dimensions of the fabric with attendant firming of the woven fabric. The fullable fibre may be wool, and the fullable fabric may also contain fibres of polyamide, polyester, polyacrylonitrile, polyvinyl chloride, polyvinyl acetate, polyvinyl alcohol, polyethylene, polypropylene, polyvinylidene chloride, polyvinylidene cyanide or copolymers. The non-woven fibre may be fullable or not. The base fabric may be partially fulled before the non-woven fibres are applied. The fulled fabric may be suctiontreated while wet, dried and again suctiontreated to remove loose fibres. The nap of the felt may be trimmed by shearing or singeing.
Patent GB-765619-A (GB)
Title: Improvements relating to the drying of bird manure
IPC: C05F3/00
Filed: 1955-03-04
Abstract: In the preparation of a fertilizer bird manure is intimately mixed with 10 to 20 per cent by weight of charcoal or bone carbon before drying at a temperature not exceeding 50 DEG -55 DEG C. the manure being mixed before or after drying with salts such as potassium sulphate, ammonium sulphate, saltpetre, superphosphate or phosphoric acid.  The product may be formed into tablets, granules or small blocks.
Patent GB-1079843-A (GB)
Title: Improvements in or relating to valve shanks for type valves
IPC: B60C29/00
Filed: 1966-02-15
Abstract: 1,079,843. Valves. ALLIGATOR VENTILFABRIK G.m.b.H. Feb. 15, 1966 [March 4, 1965], No. 6541/66. Heading F2V. A cylindrical, pipe-like, valve shank 1 is provided at its upper end 2 with a threading 3 for the reception of a tyre valve (not shown) and the constant internal diameter 4 of the valve shank is provided with a constriction 5 which serves as an abutment for the foot of the valve. The constriction consists of short indentations extending in the axial direction or the constriction may extend around the entire circumference of the shank. The shank may be bent below the constriction 5.
Patent GB-387148-A (GB)
Title: Improvements in or relating to optical systems for photophonographic apparatus
IPC: G11B7/00
Filed: 1932-03-04
Abstract: 387,148. Recording sound. RADIO CORPORATION OF AMERICA, 570, Lexington Avenue, New York, U.S.A.- (Assignees of Maurer, J. A. ; 620, West 116th Street, New York, U.S.A.) March 4, 1932, No. 6549. Convention date, March 17, 1931. [Class 40 (ii).] An optical system for recording and reproducing sound has the objective lens in the form of a complete cylinder having a linear apert u r e o f approximately one-third of its diameter and mounted in a recess in the end of a supporting tube housing the other lenses and the light source and adjustable longitudinally and around its axis. A slot in the bottom of the recess defines the aperture through which light is directed to the cylindrical lens, which is held against the slot by a pair of spring plates which define the ends of the image directed on to the record. A feeler gauge inserted between the record and the lens facilitates adjustment. The Figure shows the cylindrical lens 2 formed of glass rod À12 inches diameter held in a recess 4 over a slot 5 of À04 inches width in the end of a mounting tube 1 by spring plates 6 which define the ends of the linear image projected by the lens on a record 9, which is spaced from the surface of the lens a distance of about one-quarter of the diameter of the lens. This distance is readily adjusted by a feeler gauge.
Patent GB-164810-A (GB)
Title: Improvement in direction lamps for motor cars, motor lorries and the like
IPC: B60Q1/34
Filed: 1920-03-04
Abstract: 164,810. Parry, M. March 4, 1920. No Patent granted (Sealing fee not paid). Road-traffic signals on vehicles; semaphore and pointer luminous signals; visible non-luminous signals; semaphore and pointer signals.-A turning signal for motor vehicles comprises a fixed cylindrical casing s having its axis horizontal; a hollow arrow-shaped arm j provided with transparent faces f and mounted on a crank member e so as to be rotatable in a vertical plane around the casing s; the casing being provided with lateral holes a through which light from a lamp in its interior illuminates the interior of the arm in either of its two horizontal signalling positions; and a " stop " indicator sliding in a vertical slot, visible through an aperture when the movable arm is horizontal and raised out of indicating position by a cam member p on the arm when the said arm moves to its vertical position. The " stop " indicator is transparent and is illuminated from the rear by light from the lamp passing through a hole c in the casing. The outer rim g of the arm is enamelled red for daylight signalling, and the casing shows a red light to the rear at night. The signal is operated by a handlever m through bevel-wheels l and the shaft k.
Patent GB-1419209-A (GB)
Title: Substituted diphenylethers and herbicidal compositions formed  therefrom
IPC: A01N33/22
Filed: 1974-02-14
Abstract: 1419209 Halogeno-nitrodiphenylethers ISHIHARA SANGYO KAISHA Ltd 14 Feb 1974 [20 Feb 1973] 6781/74 Heading C2C The invention comprises 2,2<SP>1</SP>-dichloro-4-trifluoromethyl - 4<SP>1</SP> - nitrodiphenylether, 2- chloro - 4 - trifluoromethyl - 21 - fluoro - 41- nitrodiphenylether, 2,6,2<SP>1</SP> - trichloro - 4 - trifluoromethyl - 41 - nitrodiphenylether and 2,6- dichloro - 4 - trifluoromethyl - 2<SP>1</SP> - fluoro - 4<SP>1</SP>- nitrodiphenyl ether which may be prepared by condensation of a 2-chloro- or 2,6-dichloro-4- trifluoromethyl halobenzene with a 2-halophenol in the presence of an alkaline compound followed by nitration of the resulting diphenylether at the 4<SP>1</SP>-position. 2 - Chloro - 4 - trifluoromethyl - 21 - fluorodiphenylether is prepared by condensation of ofluorophenol and 2-chloro-4-trifluoromethylchlorobenzene in DMSO in the presence of KOH. Herbicidal compositions useful in dry (upland) or wet (paddy) fields comprise a compound as set out above together with an inert diluent or carrier and optionally together with other herbicidal, insecticidal or fungicidal compounds or fertilizers.
Patent GB-1503272-A (GB)
Title: Aromatic cyanic acid esters
IPC: C07F9/08
Filed: 1976-02-20
Abstract: 1503272 Aromatic cyanic acid esters BAYER AG 20 Feb 1976 [22 Feb 1975] 06789/76 Headings C2C and C2P [Also in Division C3] The invention comprises a process for the preparation of aromatic cyanic acid esters having a free hydroxyl group which is not sterically hindered comprising reacting aromatic dihydroxy and polyhydroxy compounds with cyanogen halide in aqueous solution in the presence of a water-immiscible organic solvent and of an inorganic base. In particular the di and polyhydroxy compounds correspond to the general formula (HO) m -Ar-(OH) n  wherein Ar denotes an optionally substituted aromatic radical and n and m are identical or different and represent one of the numbers from 1 to 5, with the sum m+n being not greater than the number of replaceable hydrogen atoms in the radical Ar. The process is preferably carried out at a temperature in the range -40 to + 65 C. and a pH in the range of 3À5 to 9À5. Aromatic cyanic acid esters of the general formula (HO)m-Ar-(OCN) n  wherein Ar n and m are as above are claimed per se. The compounds of the formula wherein R 1  is methyl or ethyl are disclaimed. Also the invention comprises aromatic cyanic acid esters of the general formula II wherein R<SP>3</SP> to R<SP>6</SP> are identical or different and represent hydrogen, halogen or alkyl a to f are identical or different and denote 0, 1 or 2 provided that a, c and e are not simultaneously 0 and b, d and f cannot be greater than 3.
Patent GB-1487054-A (GB)
Title: Photographic shutter
IPC: G03B15/03
Filed: 1976-02-20
Abstract: 1487054 Camera shutter EASTMAN KODAK CO 20 Feb 1976 [21 Feb 1975]  06816/76 Heading G2A The shutter has a member 38 movable from a cocked to an uncocked position to make an exposure, an actuator 76 on the member 38 for closing and then opening a flash synch switch 60, 62 during said movement, and means for preventing the switch being closed by the actuator 76 during movement of the member 38 back to its cocked position. In Fig. 1, member 38 is moved in direction A by a spring 46 to make an exposure. Actuator 76 raises switch contact 60 into abutment with switch contact 62 to fire the flash and then releases contact 60 to open the switch. To cock the shutter a film advance lever 52 is moved in direction B to move a cover member 40 to the right to block the exposure aperture 41. An extension 54 on member 40 moves member 38 to the right and a cam 78 on member 40 pivots a lever 72 upwards to move both of contacts 60, 62 out of the range of actuator 76. In Fig. 2 (not shown), the shutter member (38') has an extension (80) formed with upper and lower sloping surfaces (82, 84). During exposure, the upper surface (82) raises one contact (62') into engagement with the other (60') and then releases it to open the switch. During cocking the lower surface (84) moves said one contact (62') downwards away from the other contact (60') to prevent closure of the switch.
Patent GB-213251-A (GB)
Title: Improvements in the process for the manufacture of farnesol
Filed: 1924-03-17
Abstract: Farnesol, a sesquiterpene alcohol, is prepared by the action of glacial acetic acid, acetic anhydride, or chromum trioxide, upon nerolidol; when chromium trioxide is used the product is farnesal which must then be reduced to farnesol.  According to examples (1) nerolidol is heated with acetic anhydride for 20 hours at 120-140 DEG C., the excess acetic acid removed by distillation or treatment with water, and the product saponified with alcoholic potash and converted by heating with phthalic anhydride into a phthalic ester; the latter is purified by solution in alkali and ether extraction, reprecipitated by acid and saponified to obtain the farnesol; the latter upon oxidation yields farnesal which forms a semicarbazone: (2) nerolidol is heated with chromic acid in glacial acetic acid, the farnesal precipitated by water, distilled, and reduced by means of alcohol and sodium amalgam. Farnesol may be used as a perfume or for the preparation of other perfumes.  The Specification as open to inspection under Sect. 91 (3) (a) refers to the use of acid agents generally for the conversion of nerolidol into farnesol.  This subject-matter does not appear in the Specification as accepted.
Patent GB-736536-A (GB)
Title: Improvements in or relating to television, tele-cinematograph and like apparatus
Inventor: SARSON ALAN ELMER
IPC: H04N3/34
Filed: 1953-03-12
Abstract: 736,536. Television. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. March 4,1954 [March 12, 1953], No. 6894/53. Drawings to Specification. Class 40 (3). In a television system employing an auxiliary deflecting force to wobble the scanning spot in a direction transverse the line direction of scan, the amplitude of the deflecting force is modulated in dependence upon the first differential with time of the field deflecting force whereby correction is effected for variation in the spacing of successive lines in a field due to non-linearity in the field deflecting waveform. The invention is described as applied to a system employing electromagnetic deflection in which, in addition to the normal field and line deflecting coils, two auxiliary coils coaxial with the field coil are provided, one being energized from a generator providing the wobble deflection wave, and the other being employed to derive by induction a voltage proportional to the rate of change of current in the field coil. This voltage is applied through a filter to remove the component at the spot-wobble frequency also induced in the coil, and after amplification controls a modulator stage through which the output of the spotwobble generator is applied to the deflection coil. Fig. 4 (not shown) shows a detailed circuit of the filter, amplifier, modulator and spotwobble generator. A single coil may replace the two auxiliary coils. When it is desired to apply correction on both the forward and flyback strokes of the field scan the first differential voltage derived from the auxiliary coil is applied to the modulator through a full-wave rectifier.